At a previous company, we had a feature flag/config system where each client (tenant / org / account) had a JSON blob associated with it. The JSON turned on var

At a previous company, we had a feature flag/config system where each client (tenant / org / account) had a JSON blob associated with it. The JSON turned on various features and provided any feature-specific configuration data. Some features were pretty simple and were literally just a bool. Others required a dozen lines of JSON. Clients never saw this stuff. It was done by the engineers during onboarding. It was a pretty complex B2B SaaS product and "onboarding" could take several days of back-and-forth with the client. It was also not a true plugin system, more of a monolith. The entire code base was shared across all the tenants.